Expansible mandrel.



H. J. WHITE. EXPANSBLE MAN DREL.

[N VEN T 0R Allume),

iran srnfrns PATENT onirica.

HENRY J. wnira or Monmsrown, Anew massif, Assistme To T. n. Duc-Hs asons,

or Your, N. Y.

EXPANSIBLE MANDREL Specification. of Letters IEatent.

Patented Got. 2,8, 1913.

Application filed July 16, 1912', Serial No. 709,743. Renewed August29', 1913.l Serial No. 787,395. Y

To all whom t may concern: Y

Be it known that I, HENRY J. IVHITE, a citizen of the Unitedv States,residing at Morristown, in the county of Morris and State of New Jersey,have invented certain new and useful Improvements in ExpansibleMandrels; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appert-ains to make and use the same.

This invention relates to improvements in expansible mandrels, and moreparticularly to such as are adapted for use in winding sheet met-al asthe same comes from the rolling mill and slitting mechanism,the objectof the invention being to provide a winding mandrel which shall besimple in construction, which may be easily expanded or contracted, andwhich shall effectually perform all its functions.

Wit-h this object in view, the invention consists in certain novelfeatures of construction and combinations of parts as hereinafter setforth and pointed out in the claim.

In the accompanying drawings, Figures 1 and 2 are longitudinal sectionalviews showing the parts in diderent positions; and Fig. 3 is an endview.

1 represents a shaft, the intermediate portion, 2, of which may be madeangular (preferably square) in cross section. At one end of the angularportion 2, a head 3 iskeyed to the shaft and provided in its inner facewith an annular groove 4, the inner wall 5 of said groove being beveledto form a cam surface.- Beyond the opposite end of the angularintermediate portion of the shaft, the latter is provided with a screwthread 6 for the accommodation of a head 7. This head is also made inits inner `face with an annular groove 8, the inner wall 9 of which isbeveled to form a cam surface..

The head 7 is also provided'with a hand wheel l() for turning the sameon the threaded portion of the shaft and adjusting it longitudinallythereon.

The body of the mandrel comprises a plurality of transversely curvedsegments (four being shown in the drawing), and each segment is providedat both of its ends with curved segmental ribs 11, the ribs at respecitive ends of the several segments coperating to form, in eifect-,brokenannular ribs to enter the grooves 4 and 8 in the heads 3 and 7. Theinner faces 12 of the ribs 11 are beveled to form cam surfaces, so thatwhen the head 7 is moved on the shaft toward the segments, the cam faces5 and 9 of the heads, coperating with the camffaces 12 of the ribs willcause the segments to be moved radially and thus expand the body of themandrel.

Each mandrel segment is provided with a plurality of pockets 13, eachhaving a hole 14 in its bottom, and the pockets of onesegment aredisposed in line with the pockets of the diametrically oppositesegment.` Bolts pass through the holes of each pair of alining pocketsand through elongated slots 15V in the portion 2 of shaft, the ends ofsaid" bolts terminating in the pockets. Each bolt is provided at one endwith a head 16 and at the other end with a nut 17, these heads and nutsforming abut-ments for the outer ends of springs 18 located in thepockets the inner ends of said springs having bearings in the roll ofsheet metal which has been woundY thereon. For the purpose of securingthe end of the material to be wound, to the mandrel, a clamp 19 will beemployed.

Various slight changes might be made in the details of construction ofmy invention without departing from the spirit thereof or limiting itsscope and hence I do not wish to restrict myself to the exact detailsherein set forth. i

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is Y In an expansible winding mandrel, thecombination with a shaft having elongated slots, of heads on said shafthaving annular cam faces, curved segments surrounding the shaft andhaving cam faces at their ends to coperate with the cam faces of theheads, y

ing transversely through the elongated slots In testimony whereof, Ihave signed this of the shaft, each bolt terminating inpookspecification in the presence of two subets of dametroally oppositesegments, and scrbng witnesses. provided at its ends with abutments andHENRY J. WHITE. springs located in said pockets between the "Witnesses:

abutments at the end of the bolts and the Gr. K. GRIENLY,

bottoms ofthe pockets. HAROLD E. SMITH.

Copies of this patent may 'be obtained for ve cents each, by addressingthe Commissioner of Patents.

Washington, ID. C.

